2027 ICD-10-CM Diagnosis Code H27.122Anterior dislocation of lens, left eye

ICD-10-CM Codes›H00–H59›H25-H28›H27

ICD-10-CM H27.122
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H27.122 is a billable ICD-10-CM diagnosis code for anterior dislocation of lens, left eye. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. Coders also document this condition as anterior dislocation of lens. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cataract and other lens disorders.

Code Identity

ICD-10-CM Code
H27.122
Billable Status
Yes — Valid for Submission
Code Describes
Anterior dislocation of lens, left eye
Short Description
Anterior dislocation of lens, left eye
Same as the full description in the CMS dataset.
Parent Code
H27.12
Anterior dislocation of lens

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH25-H28Disorders of lens
CategoryH27Other disorders of lens
This CodeH27.122Anterior dislocation of lens, left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anterior dislocation of lens
  • Anterior dislocation of lens of left eye

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H27.122: its own notes plus those printed at H27 and Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From H27 Other disorders of lens applies to 19 codes
  • congenital lens malformations (Q12.-)
  • mechanical complications of intraocular lens implant (T85.2)
  • pseudophakia (Z96.1)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Notes

General instructions on how these codes are used.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE002
Cataract and other lens disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Eye Diseases

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The full article covers:

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Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H27.122 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
379.33 Ant dislocation of lens
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H27.122Overview

What is the ICD-10 code for anterior dislocation of lens, left eye?

The ICD-10-CM code for anterior dislocation of lens, left eye is H27.122 (sometimes written as H27122). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H27.122 (Anterior dislocation of lens) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report anterior dislocation of lens, left eye on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H27.122 group to?

When anterior dislocation of lens, left eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

Can H27.122 be reported with a code from Q12?

Not as a rule. The Excludes1 note at H27, which applies to H27.122, lists "congenital lens malformations (Q12.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of H27.122?

Under the General Equivalence Mappings, anterior dislocation of lens, left eye converts to ICD-9-CM 379.33 (ant dislocation of lens). The mapping is approximate, so confirm the match fits the documentation.